Added Travis CI

Author: tomachristian

.travis.yml

@@ -0,0 +1,6 @@
+sudo: false
+language: node_js
+
+node_js:
+  - "node"
+script: npm test

spec/helpers/common.js

@@ -169,7 +169,7 @@ const customMatchers = {
                                 return {
                                     pass: false,
                                     message: `Expected output file '${expected.file}' ` +
-                                             `to contain:\n` + expectedPart
+                                             `to contain:\n` + expectedPart + ". But it contains:\n" + fileContent
                                 }
                             }
                         }

spec/sass-loader-interop-spec.js

@@ -69,7 +69,7 @@ describe("Running CssEntryPlugin and SassLoader for scss files", () => {
                 expect(this.webpack).toOutput({
                     file: "main.bundle.css.map",
                     withContent: [
-                        "fixtures/styles/style1.scss",
+                        "styles/style1.scss",
                         "@extend"
                     ]
                 });